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//! Partial lines can be printed, and the progress bar does not overwrite them.
use std::io::{self, Write};
use std::thread::sleep;
use std::time::Duration;
struct Model {
i: usize,
legal: bool,
}
impl nutmeg::Model for Model {
fn render(&mut self, _width: usize) -> String {
assert!(self.legal);
format!("progress: {}", self.i)
}
}
fn zz() {
sleep(Duration::from_millis(300));
}
fn main() -> io::Result<()> {
let options = nutmeg::Options::default();
let model = Model { i: 0, legal: true };
let mut view = nutmeg::View::new(model, options);
for i in 1..=5 {
view.update(|model| model.i += 1);
zz();
write!(view, "partial output {i}... ")?;
zz();
view.update(|model| model.i += 1);
zz();
write!(view, "more... ")?;
zz();
view.update(|model| model.i += 1);
zz();
write!(view, "more... ")?;
zz();
view.update(|model| model.i += 1);
zz();
writeln!(view, "done!")?;
view.update(|model| model.i += 1);
zz();
for _ in 0..4 {
view.update(|model| model.i += 1);
zz();
}
}
Ok(())
}
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